Chables o



(Model.)

0. 0. NAS'ON.

HARROW.

N0. 246,333. Patented Aug. 30,1831.

Inventor: M 0? rren STATES PATENT price.

CHARLES O. NASON, OF MOLINE, ILLINOIS, ASSIGNOR TO DEERE 8t (30., OFSAME PLACE.

HARROW.

SPECIFICATION forming part of Letters Patent No. 246,333, dated August30, 1881.

Application filed May 3, 1881.

To all whom it may concern Be it known that I, GHARLEs O. NAsoN, ofMoline, Illinois, have made a new and useful Improvement in Harrows, ofwhich the following is a full, clear, and exact description, referencebeing had to the annexed drawings, making part of this specification, inwhich Figure 1 is a view in perspective of a barrow having theimprovement; Fig. 2, a detail, being a side elevation of one of thebarrow-teeth attached to the bar, and as when the tooth is in an uprightposition; Fig. 3, a cross-section on the line as w of Fig. 2, a portionof the plate being broken away to show the upper end of the tooth; Fig.4, a side elevation of the parts shown in Fig. 2, but as when the toothis inclined; Fig. 5, a cross-section on the line 3 y of Fig. 4, aportion of the plate being broken away to show the upper end of thetooth; Fig. 6, a detail, being a view, looking upward, of one of theplates and bolts used in attaching the tooth to the bar, and showing thelatter in section in the line of the dowels of the plate; and Fig. 7 aview in perspective, looking toward the inner side, of one of theplates.

The same letters denote the same parts.

The present invention is an improvement in that classof harrows whereinthe teeth can be set slanting or straight, according to the kind ofharrowing to be done.

It consists, mainly, in the construction of the teeth and the mode ofattaching them to the harrow-bars.

Referring to the drawings, A represents a harrow, or a section of aharrow, having the improvement in question.

B B represent the harrow-hars, joined in the usual manner, as by the rod0 and thimbles C, to form the frame of the implement.

D D represent the barrow-teeth. They are attached to the bars B B bymeans of the bolts E E and plates F F, and more particularly describedas follows: The teeth at their upper ends are perforated to hang andswing on the bolts E E, the latter at their inner ends being secured inor to the bars B B, and their projecting ends passing through theperforations d d in the teeth, and held or secured in or to the plates FF, in practice the head of the bolt coming against the opposite side ofthe bar to that on which the tooth is hung, and theouter end of the boltpassing through the (Model plate and provided with a nut, which, whenscrewed up, bears against the plate and forces it against the bar. Thebolt passes through the upper end of the plate, that portion of the boltbetween the plate and the bar constituting the bearing for the tooth toswing on. The plate F, in addition to holding the outer end of the boltE and keeping the tooth D upon the bolt, serves to confine the toothsuitably in a lateral direction to the bar, and also to limit thevibration of the tooth as it is swung upon the bolt, and support it atthe side at a point below its connection with the bolt. To this end theplate is made to stand out from the bar sufficiently to provide roombetween it and the bar for the tooth to be held loosely on the bolt, andat or toward its lower end, be low the level of the bolt, it is securedto the bar, so as not to yield when the tooth is drawn against it, thevarious purposes being conveniently accomplished by furnishing the plateF with a flange, f, which bears against the bar B, holding the body f ofthe plate suitably away from the bar, and with the lugs or (low elsf fwhich are embedded or made to engage in or with the bar B, and therebykeep the plate from turning on the bolt. The flange fis omitted at thebottom of the plate, forming an opening, f, for the tooth to swing in.

The special advantage of the improvement consists in its furnishingasimple and convenient means by which the harrow can be readily changedfrom a breaking-barrow to a smoothing one, the only thing needed to bedone in effecting such change being to change the hitch from one end ofthe harrow to the other end, as follows: When it is desired to use theharrow for smoothing, the hitch is made to the harrow at the end a,whereupon the teeth assume the slanting position shown in Figs. 1, 4,5that is, the teeth swing on the bolts until they encounter the plates FF atf in which position the teeth ride upon the ground; but when it isdesired to employthe harrow in breaking, the hitch is made to the harrowat the end a. The teeth then swing upon the bolts in the oppositedirection and into a vertical position, as shown in Figs. 2, 3, theteeth at the side now being supported by the shouldersf of the plates F.The teeth whenlin the lastnamed position are held parallel to the bar F;but when the teeth are slanted for smoothing IOC they are held at an gleto the bar, as indicated in Fig. 5, to enable the teeth to be in theline of the draft, which is usually out of line with the barrow-bars. Toaccomplish this the body f of the plate F is made to stand out from theside of the bar B farther at the end f than at the endf as shown in Fig.6. The plate F is usually made as a casting, Fig. 7.

I am aware that heretofore several devices have been used to accomplishthe same general ends. I have now in view, and therefore do not broadlyclaim the present invention in all its parts, an absolutely originalnovelty; but I do assert that my device differs from all others in itsdetails, is stronger and more efii- 1 cient, and more easily appliedthan any before known.

I claim- 1. As anew manufacture, the plate F, of tri l angular outline,perforated at its upper end to receive the bolt E, and having the lugs ff at the lower corners, respectively, and the flangefdeeper at the end fthan at the end f and having the shoulders f f substantiall y asdescribed.

2. The combination of the bar B, bolt E, tooth D, and plate F,perforated at its upper end to receive the bolt E, which bolt fastensthe plate to the bar and supports the tooth, and having the bodyf, thelugsf f and the flangef, deeper at one end than at the other, and havingthe shoulders f" f, substantially as described.

CHARLES O. NASON.

W'itnesses:

STEPHEN H. VELIE, GILPIN MOORE.

